Strawbees Inventor Builder Kit - 50 Straws and 248 Connectors Set, Educational & Creative Building Toy, Tinkering & STEM Learning, Suitable for Children 3 Years & Up Time to go Pro  the Inventor Kit is our second biggest kit perfect for testing more advanced creations. It features 248 connectors in two random colors, 50 colorful and rigid straws, a nice blue collectors bag and an instructions manual. The connectors are compatible with all standard size drinking straws! Create a bird, a huge mechanical snake, or a replica of the pyramids of Giza. Enough pieces to start inventing really cool stuff or building with your friends. The kit is non-hazardous for children of all ages and educator-approved you can be 100% certain your child will be safe as they learn.