What do I need to get for my daughter for dance cl?

I started my 4 year old daughter Addy in dance cles and I absolutely have no idea what she needs for it. Don't bash me or anything because I don't know anything that I need to get her. Like gear for dance cles for a four year old. She is taking ballet and tap and what other cles would you suggest for a young little dance like her. She also has a lot of energy. I need help, I have no idea what I am looking for. She is also going Monday, Tuesday and Wednesday, from 5-7 pm.