Can you practise clapping a rhythm. Ask a grownup to clap and count to 4, saying 1 number per clap. Clap with them trying to keep the same rhythm, 1,2,3,4, 1,2,3,4 1,2,3,4.
Once you have mastered this, try clapping and counting to 8.
Can you make a musical instrument out of things you have at home.