This kit is a good choice for beginners on STEAM learning. It only contains 27 pieces components, but can build up to 30 different models, from basic constructions to simple machines. Children can observe how gears work and learn simple physics through hands-on experience. Manual sheet is included and assembly videos are available on-line. This kit is packed in a travel friendly bag for easy storage and carrying out. Only 27 components to build up to 30 models, good choice for beginners on STEAM learning. Compare with manual and video teaching options. Packed in a travel friendly bag for easy storage and carrying out.