Took the kids hiking and now I'm wrecked

Did a 5 mile hike with my two kids yesterday morning. Seemed fine at the time but my legs are KILLING me today. The 5yo kept asking when we could go back and the 8yo actually put his phone down the whole time which was weird but nice. We found a little waterfall and just sat there for like 20 minutes. Anyway point is my body hurts but it was actually worth it.