There is gentle irony here: the tower meant to reach God required God to descend to even notice it. Human pride is always smaller than it thinks itself. Yet God's coming down is also gracious — He engages with what His people do.
Memory phrase: God sees everything — and He is always greater.
Talk about it: Why is it a little funny that God had to come down to see the tower that was supposed to reach heaven?
Prayer: God, when I feel proud of my own achievements, remind me how great You are and how small my towers really are.