Casper kept experimenting because he was sure he'd find one that would make a good needle.

She kept experimenting, did some research and consulted her son's chemistry teacher before making a few improvements.

Just keep experimenting until you get something that works.

All of these 40 years, I keep experimenting.

"If you keep experimenting like that, you'll run out of dogs pretty soon," Stylles said.

The modest success of that business provided them with the money to keep experimenting with the coaster idea.

They keep experimenting with different meds, but this one has done the trick!

And even if the industry's ability to cut inmate costs is unconfirmed, some officials are willing to keep experimenting with privatization.

She kept experimenting with the recipe till it came out just right.

Peter kept experimenting as we went, testing which parts of our environment were real and which mere images.