MORE PIECES: The STEM building toys include 170 pieces of building blocks for boys and girls, 6 colors of building tools that can create 18 design models: Gray *30, Yellow *30, Blue*30, Red*30, Green*30, and 20 removable wheels. It is a great toddler learning toy for 3 4 5 6 7 8 9 10 year old boys and girls. PORTABLE STORAGE: All blocks for kids ages 4-8 are packed in a sturdy plastic storage box, suitable for traveling and taking out to play! After the game is over, kids can put the product back into the box, which can exercise the child's storage habit and keep the child's play area and living space in order. IDEA BOOK: Caferria building set includes an instruction manual with pictures, 18 design models can be created according to the instructions, and children can design more imaginative models according to their own ideas, we encourage children to be creators of their own world, and create anything they dream of! SAFE DURABLE: The colorful STEM kits are made of ABS plastic instead of cheap PP, compared to common building toys for kids ages 3-5, caferria building kits fit together well and can last for years. And is certified free of lead, cadmium, and BPA. Round edge design, not sharp, to ensure a safe gaming environment! LEARN BY PLAYING: By playing with building educational toys, children can get a strong sense of color at an early age, more quantity and variety of shapes can be multiplayer. Is the best Christmas/Birthday/Easter gift for girls and boys 3-10 years old.