Los Alamos STEAM Lab has class sets of a variety of robots that can be rented to classes for a day.
Ozobot
We have 9 Ozobots Evos for rent. Evos are designed to follow lines and read color codes to perform tricks and follow directions such as turning left at the next intersection.
We send the bots off with custom designed magnetic tiles as well as white boards to stick them to. They include turns, intersections, straights, and color codes. Arranging the tiles is a wonderful exercise in spacial reasoning.
Additionally, we have a number of laminated challenge card mazes that children need to use color codes to solve. Ozobots can also be programmed using tablets if your class has access to installing the apps.
Rental cost is $30/day. Replacement cost is $90/robot.