"Well, I'm glad that you didn't decide to skiv off in my absence," Hermione muttered.
"I didn't!" Harry protested. "This is serious work!"
"Yeah, I can tell."
"But Mum really did tell us to de-gnome the garden," said Bill.
Fleur noticed a small pile of ripe melons sitting next to the improvised cannon and snorted.
"I am certain that she did," she stated.
"And that's not the only reason for building this," added Harry. "It's research and development!"
"For what…the next great Magical circus trick?" Hermione quipped.
"No, no…I'm serious," said Harry. "We're going to add this to the Burrow's perimeter defense system…right Mr. Weasley?"
"That's right, Hermione," the older wizard agreed. "If we can launch a gnome that far into the air…just imagine what this device could do if we were attacked!"
Hermione rolled her eyes. "So, instead of releasing the tiger, you release the gnome!"
"Nah…that's just killing two birds with one stone," Harry claimed. "Had to get rid of the gnomes anyway. Once we've figured out how to accurately aim this thing, and set up some kind of forward observer post to call in adjustments…well, imagine what this could do if a bunch of Death Eaters showed up one night and started to overpower the ward line?"
"Or stood outside the line and took the time to set up their own overlapping wards," added Bill. "That'd take at least a couple of minutes, and once they got through the lines almost as much time before they got within range of their wand fire. Plenty of time for us to aim this device and start lobbing things their way."
"Yeah…things other than gnomes," said Harry.
"Fetchez la vache?" Fleur asked.
"Nah…we'll need to build a catapult for that," said Harry. "We've only started to brainstorm…canisters of silver grapeshot if we're up against a pack of werewolves, for example."
"Or a container filled with magical laughing gas…or Peruvian Instant Blackness Powder."
"Or a dung bomb," added Arthur.
"That doesn't sound very damaging," said Hermione.
"It might be if you're using Nundu dung."
Hermione sighed. "But how is any of this even legal?" she asked. "You should know about the Muggle Protection Act better than anyone, Mr. Weasley."
"I think that I do know it better than anyone else," Arthur replied. "Which is why I'm quite certain that we're in the clear."
"But…you magically enlarged Q-tips. And enlarged a tennis ball canister. And you certainly had to have hardened the plastic, or else the barrel would have exploded in your face!"
"Yes, we did all that, Hermione…but we didn't enchant any of those pieces…we just changed their physical properties."
"But what about the gnomes?"
"No harm, no foul?"
"I think that they actually enjoy it!" added Bill. "I've seen at least one of them running back so that they could get caught and launched again."