Amazon has the Nerf Dog Compact Tennis Ball Blaster for $15.50 - 15% off with coupon (Clip Coupon) = $13.17 with free shipping on $25+. Features re-load hands-free, adjustable power, shoots tennis balls 50 feet into the air.
Amazon has the LEGO Overwatch 75974 Bastion Robot Action Figure (2019 set) for $33 with free shipping. Contains 602 pieces. Has excellent Amazon Reviews.
Walmart has it for the same price.
Walmart has the Thomas & Friends Wood Lift & Load Cargo Train Track Set (GGH31) for $29 Shipping adds $5.99, or pad your order to $35 to bag free shipping. Features includes Charlie, 2 Troublesome Trucks, 2 cargo pieces, and ??poseable crane operator figure, track layout includes 2 track adaptors, transfer crane, cargo loading station, ramps, and 4-way crossing
track adaptors connect to other Wooden Railway track systems.
Amazon has the Discovery Kids Mindblown STEM 12-in-1 Solar Robot Kit for $15 with free shipping on $25+ or with Prime. Comes with all of the parts you need to build real working robots from the ground up! With a wide assortment of different moving and connecting parts like gears, plates, tires, and shafts, you can use the included blueprints to build 12 different styles of robots.
Has good Amazon Reviews.