On your first two days you can create this scene.
Use small bubble wrap, paint with blue paint and after a little while rub the paint with a tissue (this helps it dry and attach onto the plastic).
Cut out grass, a house and if you have a flower punch you can add some coloured flowers to the garden.
Add some fluffy clouds.
Day 3 - use a brown felt tip pen to colour in a ice scream stick.
Day 4 - Cut small squares of tissue, crinkle each square into a little ball and glue onto the tree. I found double sided tape worked well. 
Day 5 - add a sun (glue with glitter) and a rainbow (I had small coloured sticks).
Use some food colouring to make some ice in the 3 primary colours.
We had our three primary colours a little bit back and then the 3 glasses in between where we mixed two primary colours. This helped to show the colours of the rainbow. On the far right we put all three primary colours in to see if we could get brown.
Our final colours. The orange and purple looked better with more light behind them.
We created our own colour wheel. Sorry about the shine of the flash though.
