NPD Group Inc. this week said Nintendo Co., Ltd.’s Nintendo Labo Variety Kit ranked as the No. 4 top-selling software at U.S. retail in Apr.

In Apr., Nintendo Labo Variety Kit ranked as the No. 4 best-selling software across all platforms for the month.

Nintendo Labo is a new line of interactive building kits that allow users to construct cardboard toys that utilize the Nintendo Switch hardware called Toy-Cons.

Toy-Cons include a piano, fishing rod, motorbike, and RC car.

Nintendo Labo is sold in two kits – the Variety Kit and the Robot Kit.

The Nintendo Labo Variety Kit includes materials to build the Toy-Con RC Car, Toy-Con Fishing Rod, Toy-Con House, Toy-Con Motorbike, and Toy-Con Piano at $69.99.

The Nintendo Labo Robot Kit includes materials to build the Toy-Con Robot at $79.99.

Finally, a customization kit that includes stencils, stickers and colored tape sells at $9.99.