Need some ideas!! Please help!!

[LeBe]

Hi.
I have a son who is 6 months old. I am still at home looking after him everyday but just recently I have been very busy and havent really spent any quality time together. So I now have a few days just me and ds and want to do nice things, but have a very low budget to do so. He is old enough to take things in and roll around but not old enough to go to playgyms etc.

Any ideas warmly welcomed!

swimming
Mother and tots - you get a stewed cup of tea and a biscuit and he gets to see new toys and others his age.
Trip to the park to feed the ducks

Take him for walk pointing out things as you go along !