The meta. 4 has 4 different models that can easily be dissembled and reassembled. The t-rex walks on 2 legs with jaws that try to eat everything in its path. The rhino beetle has 6 legs and a gaping jaw. The drill vehicle has a rotating drill bit. The robot has visible gears that shuffle it forward. Meta. 4 is powered by sunlight, so batteries are never needed! Tools you may need: diagonal cutters and safety glasses. Perfect for young engineers age 8+. Elenco teach products are based on stem activities (science, technology, engineering, math) to teach and encourage kids in their development, all while having fun! All teach tech green-energy robots are powered by either water, wind, or sun, so there are no batteries required. Perfect for future engineers ages 8+.  # Pieces In Set: 60 Learning Skill: Science Recommended Ages: 8 Years And Up Measurements: 8.25 Length/Inches Assembly: Ready-To-Assemble Base Material: 100% Plastic Care: Wipe Clean Country of Origin: Imported p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 15.0px Calibri; -webkit-text-stroke: #000000} span.s1 {font-kerning: none} WARNING: CHOKING HAZARD – small parts. Not for children under 3 years.