The film is about a young girl who wants to save her nan from getting older so is taken through her mirror by a kind of puppet boy who lives on the other side. There is a witch or queen who lives on the other side who has a magic tree and the fruit from the tree keeps the queen young so the girl tries to get some for her nan but if the fruit falls and touches the ground the fruit disappears, the girl manages to get some fruit but trips over when returning home through the mirror and drops all the fruit and it disappears.

Hmm, there's a slim possibility that this is The Hugga Bunch Movie. It's a virtually unknown movie that is seldom asked about, but it certainly deserves a wider audience.