Spam88 really hope you mean 'muslin'!
Tape a large sheet of paper to the table/high chair, then give chunky crayons (supervised), they might manage to make some marks.
Texture play - foam, bubbles, sand
Sing-songs. If you've got a piano, sit them on your lap and let them have a go
Play-do - give implements so they can make marks too
Ditto the random basket of stuff. That's a nanny trick - look up "Treasure Basket" for ideas. Watch spoons though as if they stick one in their mouth and then fall on it, it cuts their palate.
A 'safe' kitchen cupboard full of tupperware and stuff.
Play drums on saucepans
Make sock puppets
Investigate things like Sing and Sign, Musical Treehouse, Baby Yoga etc...