PS4 Infinity 2.0 Starter Pack and compatibility with PS3

I'm thinking of purchasing an Infinity 2.0 starter pack for the PS4 for my little girl who recently got into gaming. My question is, are the PS3 figures compatible with the PS4 system? My wife has a guy at her office selling off a ton of the figures from his PS3 system so I'm wondering if they work on the PS4 system once I have the initial stuff to play? TIA

Way to pick a real difficult sandbox game lol.

What? He said he is buying it for his girl.. Also, even if he wasn't, who cares?

I'm joking mostly, but its like introducing dark souls to someone who has never played a game before.