When we spent the night at my parents' house, my boys shared a bedroom. There is a crib and a twin bed in that room.
M reported to me that sometime during the night, Z woke up and began to fuss. Because he couldn't reach high enough to get Z out of his crib, he came and sat down on the floor by the crib, and held Z's hand through the crib slats. He soon fell asleep, and ended up sleeping on the floor, holding Z's hand through the slats.
Touched my heart.