The following are links to some great websites. Some have French content and some have English. Remember developing your child's first language skills is an important part of them learning a second language. If you search Mini TFO on You Tube there is a multitude of simple French videos that are age appropriate.
Some great Apps to download are:
ABC Rigolo or any apps by Hachette
Duolingo Kids
First French Words With Phonics
Fun French by Study Cat
Letter School