Magnetic blocks / cubes like Minecraft

My daughter saw my brother's design on thingiverse for magnetic toys with print-in-place magnets, and wanted me to make some for her. Since my daughter likes Minecraft, I decided to make her some building blocks.

You will need to purchase diametrically poled rare earth magnets sized 3mm x 6mm. They cost about $0.12 each on aliexpress and ship from the US so they only take about 2 weeks to arrive. They're the same magnets used to make Settler's of Catan boards magnetic.

You can get $3.00 off your first order if you use this link: https://a.aliexpress.com/_mMriwo8

There are two block types. A heavy and a light one. Due to gravity, it was nice to have some heavier ones to use for bases so that one could easier build out horizontally.

The design has magnets only on four sides to save money on magnets, and print effort. You can still build pretty much anything you need with two sides without magnets.

She didn't want to have to paint the blocks, so we used our Silhouette Portrait II and printed stickers. Instructions for stickers is on our website at https://www.princessminecraft.com/

Once we get 500 followers on Youtube, we will make these files available for free. Thank you for your support.

My brother's magnetic construction toys: https://www.thingiverse.com/thing:2663411

.2mm layer height
support_enable = True
support_type = buildplate
meshfix_union_all = False
adhesion_type = none
wall_line_count = 3

heavy:
+infill_pattern = concentric
+infill_sparse_density = 100
+top_bottom_pattern = concentric

I used white PLA but it seems like black would have been better.

You need to google how to pause your printer at a specific line height to insert the magnets. This is hard for the Ender 3 V1. Even with the proper pause codes, you only have 30 seconds to do it. Additionally, you need to hold the first magnet down as you insert the second. Finally, your print head cover can not be ferromagnetic. You can see in my images that I replaced my print head cover with a PLA 3D printed one.