I glue gunned a toilet roll tube to a circle of card to make the vase and then rolled up a strip of corrugated card to go inside the vase, so the flowers could be poked into it.
Me and the hubs cut out a load of cardboard leaf and flower shapes the night before and when the kids came over they painted the vases and the leaves and flowers with kiddy paint, then threaded the flowers onto green pipecleaners (what do americans call them?) and arranged them in the vases. I actually soaked some wooden kebab skewers in green food colouring to use as stems, but the pipecleaners seemed a lot more versatile and a lot less likely to take an eye out when I thought about it.
Some of the flowers we made were a bit too big and the pipecleaners couldn't hold them up proparly, so watch out for that if you decide to have a go at this.
Lastly I made each kid a bumble bee out of a packing peanut, some craft foam for wings and two goggly eyes (I'm not going to rest until the packet of goggly eyes is empty!)
These would make a lovely gift for grandma or auntie, or if there are any dads reading, it would be a pretty sweet mother's day gift too. As usual, the kids really enjoyed it because it involved lots of sloppy paint.