Make your Hubelino marble run even more fun with this Seesaw add-on set. This Hubelino add-on set includes two seesaws, allowing you to roll the marbles in and out at a fast speed. This makes your marbles go even faster and faster. Use your imagination and creativity to create the most fun marble runs, or use the examples from the Hubelino app. With this add-on set, you'll have hours of fun playing, building, and playing marbles! The marble runs and building blocks are made of high-quality, durable plastic, so you'll enjoy them for longer! This set is an add-on and can only be used in conjunction with the Hubelino basic, starter, or mini set. This set contains everything you need to make your marble run even better: - 2 seesaws - 19 track elements - 20 construction blocks - 2 marbles - 1 base plate