Marcelle Shriver plays with Silly String Monday in Deptford, N.J., in front of boxes containing about 80,000 cans of the foamy substance. She's led a collection effort and is sending the Silly String to troops in Iraq where it's used to detect bomb trip wires. She struggled finding someone to ship the product which comes in aerosol cans.

DEPTFORD TOWNSHIP, N.J. — Marcelle Shriver already had the party favors — about 80,000 cans of Silly String. Now, she finally has cause to celebrate.

After months of frustration, Shriver has finally found someone who will ship her Silly String to Iraq, where troops use the foamy substance to detect trip wires on bombs.

"I am so happy right now, I am shaking. I just think it's awesome that it's finally going," said Shriver, whose son is a soldier in Iraq, as boxes were loaded into a truck Monday afternoon. "I'm thrilled."

After an initial shipment went to Iraq in January without a hitch, Shriver struggled to find a way to send thousands of cans she was still collecting. One problem: Silly String is an aerosol and it's considered a hazardous material, meaning only certain companies can ship it. She also encountered problems sending more shipments through the military.

Thom Campbell, one of the founders of Capacity LLC, a New Jersey-based shipping company experienced in hazardous materials, heard about Shriver's struggles and decided to help out.

Shriver and Campbell communicated for weeks over the telephone and e-mail but met for the first time Monday when the boxes were picked up. Each praised the other for making the shipment a reality.

Working with a company called Yellow Transportation, almost all of boxes were picked up Monday in Deptford Township, outside Philadelphia where Shriver had been storing them. The 24-foot truck could only fit 14 of the 16 pallets stacked with boxes of Silly String; the rest will be picked up later.

The thousands of cans of Silly String are boxed and addressed to individual servicemen and servicewomen in Iraq. The boxes will be taken to Capacity LLC's storage facility in North Brunswick, inspected and then delivered to the United States Postal Service for delivery with other letters and packages bound for Iraq.

Shriver's Silly String campaign began late last year after her son, Todd, a soldier in Ramadi slated to leave Iraq in November, asked his parents to send cans of the product, which also is sold under names such as "party string" or "crazy string."

The troops were using it to detect trip wires on bombs. They can shoot the substance, which travels about 10-12 feet, across a room before entering. If it hangs in the air, that indicates a possible trip wire.

After sending some cans to her son, Marcelle Shriver decided to collect more for other troops. The campaign started with a collection box at her church last year and quickly ballooned, as people sent her donations of Silly String and money.

But after one shipment of about 40,000 cans went to Iraq, Shriver struggled to find someone to ship the rest.