this looks like a great mothers day/grandparent gift/ teacher gift idea. Lots of options with flowerpots, buckets, etc to put it in and with the types of flowers or stems to use and filling in the pail.
Beautiful kids crafts and project. Create the trunks in peace and lay out the colours for each one, then the kids can go to work, and you can add the finshing touches (like owls etc) when they are fast asleep! A family masterpiece