Make some puppets and put on a show in Spanish

Instead of reinventing the wheel, I'll just point you to the site I used to make my puppets. You'll find detailed instructions at Danielle's Place. You could also buy them if you're not in the mood to make one. I really like the Melissa & Doug puppets, because they're well made and are reasonably priced.

Get the whole family involved and put on a show (el espectáculo de títeres) in Spanish. The kids will certainly get excited and you'll be amazed by what they do know.

For starters, have the puppets greet each other:

Puppet 1: Hola.

Puppet 2: Hola

Puppet 1: ¿Cómo estás?

Puppet 2: ¡Estupendo! ¿Y tú?

Puppet 1: Muy bien, gracias.

Puppet 2: Adiós.

Puppet 1: Adiós.

In between "acts" you can have them sing a song such as Buenos días (tune: Frère Jacques):

Buenos días, buenos días,
¿cómo estás? ¿cómo estás?
Muy bien, gracias,
Muy bien, gracias,
¿y tú? ¿y tú?

Then do the same with buenas tardes and buenas noches. Also, ahead of time, the children could make a program (el programa) and tickets (la entrada, las entradas).