If you have 6 hours or a half day to spend in Wellingborough, you can consider:
1. Visit the Wellingborough Museum, which is located in the town center and showcases the local history and culture of the area. The tour takes around 1-2 hours.
2. Take a walk in the beautiful Swanspool Gardens, which is just outside the town center and has a lake, a children's play area, and a bird sanctuary. It's a great place to relax, and the walk will take around 1-2 hours depending on your pace.
3. Explore the Castle Fields park, which features a stunning wildlife area, sports facilities, and a playground. The area offers a good picnic spot too. You can spend around 1-2 hours here.
4. Check out the Nene Wetlands Visitor Center, which is just a 15-minute drive from the town center, and it offers stunning views of the wildfowl reserve. You can spend around 1-2 hours here.
5. Go shopping. Wellingborough has a variety of shops in the town center and the Swansgate Shopping Centre. You can spend around 1-2 hours shopping or exploring the markets.
Overall, Wellingborough offers a mix of activities, from learning about its history and culture to enjoying the parks and wetlands. So, choose the one that fits your interests the most and enjoy.