Fun Time Passes Fast

I met some puzzle friends the day before yesterday.
Meeting people with the same interests in Australia is a precious opportunity because the country is enormous. Therefore, I've chosen my best T-shirt to meet them. Here is the T-shirt.

 

As you see, there are the words rabbit and duck.
Tilt the shirt 90 degrees to the left, and you can see a rabbit. Vice versa, you can see a duck. I love this kind of picture, as do my puzzle friends.

As soon as I met them, I showed them the T-shirt.
"Look, look!"
They loved my T-shirt and asked me where I bought it. I bought it on Etsy. Here is the link.

https://www.etsy.com/au/listing/778809997/duck-rabbit-graph-t-shirt-optical?ref=yr_purchases

Fun time passed by quickly.
Let's catch up again someday, mate!

Oh, Friction

I've been thinking of a new part for my marble run machine. I got an idea last night and explained it to my husband, Juno. He said it wouldn't work well due to friction.
Friction! Oh, no! I had forgotten about friction.
It might be alright if I make it with metal, but I want to make it with wood.
Friction is always a pain in the neck. The frictional force will be changed depending on the wood.

Recently, Juno made a loop for the marble run for me. This part was what I didn't think I could make. Until we set the loop onto the board of the marble run, we were unsure how far the balls would fly because of the friction. If there was no friction, how much easier to think of the design?

The idea of the new part is my favourite, and I want to keep it. When I got the idea of the Flower Automaton, I didn't think I could make it, but I could. It's too early to give it up.

If you haven't read the blog post about the flower automaton, please visit the page below.
https://puzzlesense.blogspot.com/2021/04/the-flower-automaton.html

I hope to be able to write about the new part here.

Should I Buy A 3D Printer or Not

Making automata is one of my dreams. The other dreams are making marble run machines and making something related to these things for sale.
The most difficult one is making products for sale. I must have to make uniform and, of course, good quality. I also need a place to make them. There is a woodworking place, but it is for our family business and is almost occupied daily.

Therefore, I once considered buying a 3D Printer. It is a lot cheaper than it used to be. It could be placed in the study.

However, I have read that it is strongly recommended to open windows when you use a 3D Printer because it is bad for your health. There are some different types of 3D Printers. I forgot which one, but some of them cause respiratory system disorders by materials.
Hmm, I do not feel like using it in my study room.

There is another hurdle that I must clear, learning how to use the 3D Printer. You know, it takes work to learn something new. I wonder if I could make time for it.

Since I have read the articles about 3D Printers and considered a lot, I could not decide whether I should buy one or not as time passed.
Every time I see someone's creation with a 3D Printer, I cannot help thinking if I had one, I could have made something.

I am still deciding whether I will buy a 3D Printer.
If I did not buy it, would I regret it?