When I was young I saw this movie, probably about 10 years ago, at my local library. I don’ remember much, but I remember there being two kids who are stuck in an old mans attic, and they eat pudding and find out the man was burning money. I also rememer something about a tennis ball. I don’t think it was a horror movie because it was a kids movie showing. And everytime I try and search it up, I find flowers in the attic but I know it wasn’ that.
sounds like “The Haunted Mansion Mystery”.
it’s an episode of “ABC Weekend Specials” titled “The Haunted Mansion Mystery”.
https://en.wikipedia.org/wiki/ABC_Weekend_Special#Season_6_(1983)