seen folks with these at shows. basically a point in the right direction for a stool for kids to stand on to see over the glass . safe and portable the key requirements
ha ha,I remember being given a beer crate to stand on to play space invaders,when me and my sister were kids and in a pub in essex,the landlord joked "you will get a better score if your taller"Beer crate.
That way you can drink the beer and afterwards you have what you need for free.
Win, win.