So now I’ve told you almost everything that happened at the Great Museum Sleepover. Almost. But not quite.

We decided that we’d all go round to Frankie’s on Saturday afternoon, so that we could talk over what had happened. Oh, and to have a good laugh at the M&Ms, of course.

It was a sunny day, so Frankie’s dad had put their sun lounger out on the patio. It was one of those swinging ones, and we all piled onto it, even though it was a bit small for the five of us. It’s really old as well, so it creaked every time we swung it backwards and forwards.

“I can’t wait till Monday,” said Fliss. “Everyone in the whole school’s going to know what happened to the M&Ms.”

“And if they don’t, we’ll soon tell them,” I said, swinging the sun lounger to and fro a little bit faster. Rosie, who was squashed in the middle and had hardly any seat at all, flew off as the seat swung back, and landed on the patio on her bottom.

“Ow!” she complained, while the rest of us howled with laughter. “Can’t somebody else sit in the middle?”

We all squashed up, so that Rosie could get in on the end. Now Fliss was in the middle. I raised my eyebrows at Frankie. “How long to knock Fliss off the seat, and onto the patio?”

“Six seconds,” said Frankie.

“What?” asked Fliss.

“Nothing,” I said. “I don’t reckon we’ll get any bother from the M&Ms now for a while, do you?”

“They’ll want to get their own back sometime,” Lyndz said. “I’ve never seen Emma Hughes that mad.”

“We’ll be ready for them,” I said, swinging the seat back as hard as I could. Fliss gave a squeal, and slid off onto the patio with a thump.

“Five seconds,” said Frankie, looking at her watch. “Good one.”

“Very funny,” sniffed Fliss, climbing to her feet.

“What are we going to do this afternoon then?” asked Lyndz.

“Let’s just sit around and talk,” suggested Frankie. “I’ll make us some Coca-Cola floats.”

“Cool!” I said. “And I’ll show you my impression of Emma Hughes’ face when she saw the mummy. I’ve been practising it since yesterday.”

I pulled open my mouth and popped out my eyes as far as they would go. The others howled.

“And this is Emily Berryman.” I stopped, and put on a really deep, gruff voice. “HELP! THE MUMMY! IT’S ALIVE!!!”

I didn’t get to finish my impression of Emily, because Frankie’s mum came into the garden out of their garage. She was wearing old clothes and rubber gloves, and she had a black bin-liner in her hand.

“Frankie, if you girls want anything to eat, you’ll have to get it yourself,” Mrs Thomas said. “I’m going to make a start on cleaning out the garage.”

She didn’t look too happy about it, and I wasn’t surprised. Frankie’s family are like squirrels. They keep everything. The garage has so many boxes and bags in it that they have to park their car on the drive.

“Oh, by the way,” said Mrs Thomas, “I thought you might like this.”

She opened the bin-liner, and pulled out a cardboard mask. A mummy mask. My mask.

“I think it’s yours, isn’t it, Kenny?”

I was too gobsmacked to say anything, and so were the others. I just nodded.

“I found it in the stuffed animals gallery this morning,” Frankie’s mum went on. “Funny. I can’t think how it got there!”

This time it was us who looked like goldfish. We opened our mouths, couldn’t think of anything to say, and shut them again. Frankie’s mum put the mask back in the bin-liner, and gave it to me. I knew then that she knew. Mrs Thomas knew that it was us who’d played that trick the night before.

The question was, what was she going to do about it?

“Well, I think I’d better get on with clearing the garage,” said Frankie’s mum. “Of course, I’d get on a lot quicker if you girls gave me a hand!”

“We’d love to,” we all said together.

“It’s a bit of a dirty job, and it’s going to take a while,” Mrs Thomas pointed out. “Sure you don’t mind?”

“Oh, we don’t mind,” I said. “Not one bit.”

Frankie’s mum went back into the garage, and we all looked at each other.

“She knows!” babbled Fliss nervously.

“And she’s let us off,” Rosie added.

“Not quite,” said Frankie. “You haven’t seen our garage.”

“Your mum knew the M&Ms played that trick on Kenny,” said Lyndz. “That must be why she didn’t give us away.”

“Your mum’s really cool, Frankie,” I said.

“Yeah, but we’d better not push it,” Frankie warned us, sliding off the sun lounger. “Come on, let’s get started.”

So that was what I mean when I said we’d sort of got away with it. Although after an afternoon clearing out Frankie’s garage, I think I’d rather have been grounded for a week. It was cool of Mrs Thomas not to give us away though. Mrs Weaver would have chewed us to bits if she’d found out.

That’s it. End of story. I didn’t do so badly, did I? I was just as good as Frankie.

Look, there are the others over there by the playground gate. Come over, and say hello. Oh, and here come the M&Ms, with their faces down to their knees. I’m really going to enjoy this. I’ve been looking through all my joke books, and finding loads of jokes about mummies, so that I can annoy the Gruesome Twosome all day.

I’ll catch up with you again really soon.

By-e-e-e-e!