I always stress out before undertaking dissection. After we are finished the kids learning and curiosity makes it worth the effort. The most useful tools for dissection are a really good dissection kit, quality specimens, and YouTube videos.
One way I saved a little money was on dissection trays. Earthworms are so small I used floral foam from the dollar store. Another great part about dissecting earthworms is they come in a pack of ten which allowed me to demonstrate.
Me demonstrating to the kids. That first incision is always the most difficult for me. I always have flashbacks to the movie “Alien” and think something is going to jump out at me.
My son examining his specimen.
My daughter is always super apprehensive. Once her specimen is splayed she loves to explore. I usually keep my laptop handy. She asks the best questions along the way.

I love our dissection kit. It was a wonderful investment. Ebay is a great place to check for dissection kits.
This was a great instructional video that I found to be really helpful.