Tannaghmore garden & farm
I’m from Lurgan, there’s a very good mums and tots in the Emmanuel church in Lurgan. Oxford island, Craigavon lakes, tannaghmore gardens, Lurgan park.
People's park in Portadown is amazing
Scarva have a great play park
Tannaghmore and Oxford Island are both good, if not outdoors highly recommend PlayAway in Portadown :)
I'm not sure about Portadown but if you can travel slightly, Banbridge (Solitude Park), Lurgan (Lurgan Park) and Moira (Moira Demesne) all have nice play parks. Plus Oxford Island has a small play park at the Marina and a large play park at the very end, and Tannaghmore (?) Gardens and play park is really good as well