We have a tumble teds which is a soft play place in town. It's free for under 1s and over 1s are about £3.50 iirc. It's 100% a free for all and I have to constantly watch that the evil 4 year old baby basher doesn't smack her in the face
We also go to Mini Music on a Tuesday which is £4 a session (about a hour, includes snacks and drinks) and that's great fun! All singing and dancing, props and instruments.