For the little ones

Legoland Discovery Centre

Barton Square, intu Trafford Centre
https://www.legolanddiscoverycentre.co.uk/manchester
Buses 2 will take you there (evenings only)

Why don’t you head down to the intu Trafford Centre and step inside LEGOLAND Discovery Centre. Designed for all LEGO fans young and old, it's like you have just jumped into the biggest box of LEGO bricks ever! Join in with the battle on Kingdom Quest using an interactive LEGO laser ride; enjoy the 4D cinema and see the characters come to life on screen; build a LEGO racing car and test it on our tracks; let the kids tire themselves out in the soft play area; learn top LEGO building secrets from the Master Model Builder; see iconic landmarks in MINILAND and make a celebration even more memorable in the party rooms.

Play Factore

Trafford Way (alight at intu Trafford Centre)
http://www.playfactore.com
Buses 2 will take you there (evenings only)

Play Factore-making fun happen! Located just a 5-minute walk from the Intu Trafford Centre, Play Factore are the largest family entertainment arena in the UK and have been carefully designed to provide families with a brand new state of the art active indoor play arena to play in together. Play Factore is currently home to the tallest standing indoor slide in Europe as well as a full indoor laser tag arena, go-kart track and exhilarating zip wire. As children’s play areas go, Play Factore offers the full play package!

Manchester Aquatics Centre

2 Booth St East, Manchester
https://www.better.org.uk/leisure-centre/manchester/manchester-aquatics-centre 
Buses V1 & V2 will take you there

Manchester Aquatics Centre has a 50m swimming pool famously built for the 2002 commonwealth games. The facility provides swimming lessons and holiday activities as well as birthday parties.