Get the kids outside doing the gardening, or even better get them some seeds and plants and fence off a small area that is theirs to look after. Carrots and beetroot are very easy to grow, I say that as even I can grow them! I have done very well with rocket the last couple of months and that was in pots. Pansies or daisys for a bit of colour and they are good to go. Hopefully you will have some vegetables in the summer to eat.
I love this that I got for Freddie with all carnivorous plants, just hope they all grow.