Here are posters to help your students with numbers 1-100 in Spanish. I use posters all my time when referring to numbers and my students love having them as a reference.
This product includes a PDF and a PowerPoint version you can edit.
You can edit the colors and which numbers you want included. I based the colors on my own classroom scheme but it's easy to change the border colors for your own use.
The font I used is KG Blank Space Solid. which I have a license to use in products.