Eli is 6 months old today!

Here is Eli at 6 months old! He has his 6-month checkup in the morning, so I'll post his stats tomorrow. He does have a small lump on his upper right thigh that I discovered Saturday morning. It doesn't seem to bother him, is not red or hot to the touch. Hopefully it is nothing to be concerned about.
Do you think he is teething?

We got this exersaucer for his 6-month birthday. We spent $100 and after about 10 minutes he was done.