Museums appealing to children are often a great source of interactive websites. I liked this website years ago (see the blast from the past) and the now Plimoth-Pawtuxet Museum has redesigned it with a modern look and perspective. Pre-and a little post-Thanksgiving, you could bring some groups through this "adventure," the conceit being you are a teenage reporter investigating some Wampanoag and Pilgrim sites. I might be biased as a Massachusetts guy, but it's a nice site for students to practice discussing what they see in pictures, processing information, and there are some sequencing and word-fill interactives. There is a lot of content here and seemingly no way to save progress, but you could just visit a few of the sites or keep tabs open if you want to continue.
You Are The Historian- First Thanksgiving