If you have 6 hours or half a day to spend in Waltham Forest, here are some suggestions:
1. Visit Vestry House Museum, which showcases the history of the local area. It should take around 1-2 hours to properly explore the museum.
2. Walk along Walthamstow High Street and explore the shops, cafes, and street art. You can spend around 1-2 hours walking around and enjoying the atmosphere.
3. Visit the William Morris Gallery, which celebrates the work of the famous British artist and designer. It can take around 1-2 hours to view all the exhibits in the gallery.
4. Spend some time in Lloyd Park, a beautiful green space in Waltham Forest. You can take a relaxing stroll and have a picnic. Allocate around 1-2 hours for this activity.
5. Have a bite to eat at Eat17, a popular food store and restaurant in Walthamstow. It's a great place to try some local cuisine. Plan to spend around 1 hour here.
Overall, there are plenty of things to do in Waltham Forest in half a day. You can mix and match the above activities to suit your interests.