nearly four and nearly seven but the small one just wants to do whatever the big one is doing 
Dd1 got a cd player last year but that's ended up in the kitchen and occasionally living room because she doesn't want it in her bedroom
....They share a tv upstairs (only very occasionally)....
I'm stumped!
(they have new dollys and prams each this year to replace knackered ones but seem to have everything between them which doesn't help!)