Amazon has the Meccano MicroNoid Programmable Robot (green) for $16 with free shipping on $25+ or with Prime. List price" $40. This construction set comes with 139 pieces for building a robot, includes 139 parts, 1 motorized micro module, 2 hand tools, 1 instruction guide.
Walmart has the Pulse Performance Super-C Electric Scooter for $149 with free shipping. List price: $299. Features a 24-volt sealed lead acid (SLA) battery system and a ride time of approximately 40 minutes, designed for kids 13 years and older with a weight limit of 150-lbs.