Produced by Xiangchu Rubber, these food-grade liquid silicone baby soft building blocks are soft and safe, chewable and easy for babies to grip. They help babies exercise senses and hands-on ability, we have ISO 9001 certification and support custom specifications and colors.
Material
Food-grade LSR
Hardness
Shore A 10-30
Temperature
Certifications
Applications
-40°C ~ +180°C
Colors
Black, White, Transparent, Macaron color, Customizable
# Food-grade LSR Silicone Baby Soft Building Blocks
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Food-grade Liquid Silicone Rubber (LSR) baby soft building blocks are a safe, durable early childhood development toy designed for infants and toddlers aged 6 months to 3 years. Manufactured by 橡楚（湖北）橡胶有限公司 (Xiangchu (Hubei) Rubber Co., Ltd.) at our facility in 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, these blocks are produced from 100% pure food-grade LSR, meeting strict global safety standards for children’s products.
Unlike traditional plastic or foam building blocks, our LSR soft blocks combine the right balance of flexibility and structural stability to support infant sensory development and motor skill practice. They are naturally chewable, non-toxic, and resistant to the repeated biting, drooling, and impact that comes with toddler play, making them a long-lasting addition to any child’s toy collection. Our core design focus prioritizes infant safety above all else, with zero harmful additives, smooth rounded edges, and a lightweight form that is easy for small hands to grasp.
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Our blocks are manufactured using optimized LSR injection molding with the following controlled process parameters to ensure consistent quality:
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Produced from food-grade LSR that meets strict global food contact safety standards, our blocks contain no toxic additives or harmful chemicals that can leach into a child’s mouth during teething and chewing. The low Shore 23A hardness provides a soft, gentle texture that will not damage emerging teeth or irritate sensitive gums, unlike harder plastic alternatives. All blocks are manufactured in a controlled production environment and undergo full post-curing to eliminate volatile organic compounds (VOCs), resulting in a completely odorless product that is safe for regular contact with infants.
LSR has a naturally non-porous surface that resists the growth of mold, bacteria, and mildew, even with regular exposure to moisture and drool. Blocks can be quickly cleaned with warm soapy water, sterilized in boiling water for 5 minutes, run through a dishwasher’s top rack, or autoclaved for commercial childcare settings. Unlike foam blocks that absorb liquids and trap bacteria, or wood blocks that can crack and grow mold over time, our LSR blocks maintain a hygienic surface through hundreds of cleaning cycles.
With a tensile strength of over 6.0 MPa and 650% elongation at break, our LSR blocks resist tearing, stretching, and deformation even with rough toddler play and repeated biting. They do not crack, harden, or degrade with exposure to body oils, saliva, common toy cleaning solutions, or temperature extremes, retaining their soft texture and shape for years of use. Unlike low-quality silicone toys that break down after a few months of use, our high-purity LSR formulation maintains consistent performance through extended use.
The soft, slightly grippy texture of Shore 23A LSR is ideal for supporting infant sensory development. The flexibility of the blocks allows them to be squeezed, bent, and squished, providing tactile feedback that helps build hand-eye coordination and fine motor skills. The lightweight design (each standard 5cm block weighs just 14g) is easy for young infants to grasp, lift, and toss, reducing the risk of injury from falling blocks compared to heavier wood or plastic alternatives.
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Our Food-grade LSR Silicone Baby Soft Building Blocks are designed for a wide range of use cases:
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Our standard baby soft building blocks are manufactured at 23 Shore A, which is the optimal hardness for infant use: soft enough for gentle chewing and squeezing, but firm enough to stack and hold shape during play. For customers seeking a softer texture for specialized teething-focused products, we can customize hardness down to 10 Shore A upon request.
We offer two standard size configurations for bulk orders:
All blocks have rounded edges and corners to eliminate sharp points, and a minimum size of 2cm to comply with global choking hazard prevention standards for children’s products. Custom size and shape configurations are available for bulk OEM orders.
All our baby building blocks use only food-grade LSR material that complies with FDA 21 CFR 177.2600 food contact standards and EU Regulation 10/2011 for plastic food contact materials. We never use lower-cost industrial-grade silicone for baby products, to ensure full compliance with global children’s product safety requirements.
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At 橡楚（湖北）橡胶有限公司, we maintain a strict quality management system certified to ISO 9001, with quality control checks at every stage of production from raw material inspection to finished product testing. Every batch of our food-grade LSR baby soft building blocks undergoes:
We are committed to producing safe, high-quality LSR products for global customers, and we provide full test reports for every batch upon request.
For bulk orders, OEM customization, or general inquiries, please contact us at:
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