In Lacapelle-Biron, about an hour's drive from Coulx, there is an adventure park for young and old where you can even go tree climbing.
A real must.
Aqualand Agen - Walibi Agen
All day long you can enjoy all kinds of attractions and slides. The aqualand in Agen was built in 2017 and 2018 with the latest features in the field. It is one of the largest water parks in France.