Best Gift for 6-14 yr girls & boys: Build, Play, Learn: 28 Parts, BUILD TIME: 60 min; STEM Concepts: Air Pressure, Volume and Projectile. Screen Free Fun : Longer Constructive Activity, Multiple Gameplays,Core STEAM Learning and Superior Engagement Time Per Rupee than other DIY toys. Children Learn Best Through Play: Smartivity helps in Brain Development of your child with STEAM Concepts based game Trusted By Parents, Loved By Children in 24 Countries (incl USA, Europe). Designed by IIT Alumni in Collaboration With Children: Evaluated and approved for Construction, STEAM Learning and Fun Quotients by Smartivity STEMNinjas. Eco-Friendly, Engineering wood: Imported Premium Pine Wood. Sourced from Responsible Eco-Certified Vendors.NO SPLINTERS so that your child is protected. No Mess, No Tools Needed for assembly for a clean, MESS-FREE HOME, Elastic Bands joinery, Easy to Disassemble and Reassemble.