Inspire building site adventures as kids open the mystery box to reveal the LEGO® Technic™ Mighty Machines (42233) construction toy. These surprise sets make a fun everyday gift idea for boys and g ... irls ages 7 and up, with a vehicle to build, collect and display. Each mystery box contains 1 toy with 8 different construction site vehicles to collect, including a road roller, wheel loader, dump truck, cement truck, wrecking ball crane, mobile crane, bulldozer and an excavator. These sets give kids a great introduction to STEM building toys and engineering as each one includes a moving function powered by LEGO Technic pieces. Inside the box, kids will find a collectible playing card with stats about the model on one side and a road graphic on the other. Kids can use the cards to assemble the road as they collect sets or play and trade cards with friends. These surprise toys for kids make a cool treat for boys and girls who enjoy construction site pretend play.