DS 1 (early 20s) had clearly overlooked Mother's Day not for the first time but fortunately his girlfriend gave him a nudge. So he made a card for me . . .
In fact, he typed it on an old-fashioned typewriter. The front cover of the folded A4 piece of paper stated: "You are my mother."
On the inside it read: "Your gift is having a son like me."
A few spaces down and then (not lined up!): "You're welcome." 
He had "wrapped" it in an old cardboard box that the cat is now sleeping in.
I haven't laughed so much for a long time. However, quality-wise it doesn't quite match DS2's effort of a couple of years ago when he was about 10 years old. In cartoon style, he'd made a 3-2-1 card that started with a hand-drawn picture of a normal-ish looking chicken and ended with an exploding chicken.
I feel so blessed to have two sons who love me so much 
I bet nobody has received such personalised cards as me!!!