Marker pens for babies/toddlers

[ElphabaTheGreen]

I'm looking for marker pens for 13mo DS, the like of which we used to recommend many moons ago when I worked as a paediatric therapist. Basically, they're shaped like a small doorknob with the nib of the pen coming out of the underside of the knob, sort of like where the screw would protrude from in a knob you'd use on a kitchen cabinet or the like.

Does anyone know what I'm talking about and, more importantly, where I might find them??

Thanks in advance!

Do you mean Tadoodles by Crayola

Close, but not quite...these are more like what I'm after but I'd prefer marker pens or even crayons to chalk.

Do you mean these? My toddler uses these.

I have the ELC Mini artist chalk and crayons but I've not seen marker pens.