Maxi Monster Fun Felt-tip Pens 12 Colors

Product description from producer

Monster markers in a plastic helicopter tube. 

Soft drawing and bright colors. The thickness of the writing line is 2 mm. Body material: polypropylene (more flexible type of plastic). Body: hexagonal, equipped with a ventilated cap. Water-based ink. 

Hard plastic case with mechanical propeller serves as a gift box, as well as a reliable pencil case for further use and entertainment if you blow on the propeller.