These are two songs I composed for elementary students to help teach tempo. Luca the Turtle is to teach adagio and Randy the Rabbit is for Allegro. If you want to add Largo and Presto to your vocabulary each song can have the lyrics slightly altered.
Ex.) "Adagio" can be changed to "Largo", and "Allegro" can be changed to "Presto" and just slightly alter the rhythm to accommodate it.
I also like to use stuffed animals or figures of the animals to pass around at slow or fast speeds while the songs are being sung. Each song can be repeated from different sections as necessary to allow for the extra time it might take to finish pass the animals.