Yes
Gymtots at Park Road is ace - on lots of different times so bound to find one that suits.
Also strongly recommend Parent and Toddler dancing at Merseyside Dance Initiative on Hope Street on Monday mornings - fantastic, and you can just drop in. They also have a class for 4 and ups on Saturday morning.
LIPA also run something more formal - it's meant to be really good but it's a big commitment.