Themes for Children

I’m looking for a theme for my 18 month old’s blog. Yes, my son has his own blog and all the ones i see are so not right for him. I haven’t been able to find any out there that relate to children or childish behavior at all. Does anyone know of any good ones?

His site is https://www.ianhawthorn.com if that helps. I’m looking for something that is fun or cartoonish or something suitable for a toddler.