Welcome to Happy Little Stampers April 2021 Challenge where our theme is always Anything Goes. Definitely a great opportunity to give your stencils some love (and enable a few of us, in the process *grin*).
I inked up my STAMPlorations' Riotous Blooms slimline stencil, then cut the panel - and two additional pieces of white cardstock for dimension - with Whimsy Stamps' Slimline Windows die. I stacked the frame three deep, before insetting the window pieces. So easy...and the height/recesses give the stencil a little extra pizzazz. Sticker sentiment finished it off...
Seize the Birthday Challenge #11~Squares: my card has four squares, two next to each rectangle, so hopefully it qualifies for the Topping.