First you will want to make your thumbprint fish. Two to four fish is a good amount for one large mason jar, depending on the size of your thumbprints.

Go ahead and squirt some paint on a paper plate and dip your thumb in it. Now take your paint covered thumb and press it on a single sheet of cardstock, multiple times, leaving space between each. Use the baby wipes to remove excess paint. Set aside your piece of cardstock to let it dry a bit.

Now grab your mason jar, colored sand and styrofoam block. Trim down the styrofoam so it will fit inside the jar. It doesn't need to be perfect, in fact I just used my scissors to "saw" it down.

Place your block inside the jar and cover it & around with the decorative sand until completely covered. Set aside.

Now back to the fish. Glue on a small wiggle eye and draw on some fish embellishments, to each, with the markers.

Trim out each thumbprint fish with scissors.

Get the glue gun hot and ready.

Cut your paper straws down in size, so they fit inside the mason jar.

Hot glue a thumbprint fish to each paper straw.

Finally - and carefully - press your finished paper straws inside the mason jar/inside the styrofoam so they stand nicely. Adjust as needed.

Then display your mason jar fishbowl as is or add other embellishments {like small seashells or sequins} to the bottom for added flair!