The vamoosh is a vehicle that looks like a bird, and it is used by pocoyo that can act as a hot air balloon to fly into the sky, act as a spaceship to go into outer space, or act as a submarine to go underwater.

It has a orange balloon on top which is used to make it fly. Below it is a yellow cockpit where pocoyo, pato and Elly sit when they fly in it.

It can be seen in the intro of every episode in the background where octopus flies in it.

Pocoyo - Lost in Space (S02E21)5