First we cut two pieces of wood, one larger than the other and smoothed their corners.

Lo pegamos con clavos, así.

We glued it with nails, like this.

Con el palito de madera lo suavisamos y lo volvemos redondo e introducimos al trozo de madera mas pequeña.

With the wooden stick we soften it and make it round and introduce the smallest piece of wood.

Con la broca formamos 4 circulos y lo clavamos para sus cauchos.

With the drill we form 4 circles and nail it for its rubbers.

Listo.

Clever.