Obsessing over weird objects?

Ma

My little guy has plenty of age appropriate toys, but for some reason he always finds an “object of the day” to obsess over. Sometimes it’s a sponge, my husbands wireless bbq thermometer base, his Nosefrida (which we don’t use anymore), my Dyson vacuum filter, a comb, a cooking spatula, etc. I’m just curious if anyone else’s toddlers do this? He will literally take this object everywhere with him for a day, and only “share” it with his baby doll, but he’ll get very upset if I try to take it away. By the next day he usually finds a new object to obsess over. I just never realized a dry sponge or anything else could be so special 🤷🏼‍♀️