Drawing on foil with Sharpies.we did mini versions the other day and backed them on black card and they looked gorgeous :)
Drawing with Cars ~ Marker Cars is a fun activity that merges art and play from Housing a Forest
An upturned fruit box and paintbrushes for stabbing - great for gross motor skills and making sounds! From ABC does. could use this with golf tees and marbles
I love the use of the tool box.
Paint Bag Writing: Add some paint to a plastic bag, seal it up & spend the afternoon with your kids drawing designs through the paint. Using a Q-tip instead of your finger to avoid tearing a hole in the bag.
transportable mark making/reading with pringles tin