He truly is a treat, when he isn't driving us crazy. And because I can't share these anywhere else, here are some of my favourite quotes (I started noting them down after a while because there were so many of them) (and I know there are many of them, but I just love sharing these):

4y10m (in response to a joke about pants have legs but can't walk): "But they don't have feet and they don't have blood, so of course they can't walk."

4y10m (after I told him my gelato flavour was salty caramel and Skor, and without missing a beat): "Skor can be used for a name (character in a show he used to watch), a goal and an ice cream flavour."

4y11m: "DS3, you're being Loud Loser". Mommy: DS4, where did you hear that? DS4: "I made it up. Like Rude Randy and Polite Pete. And I'm Quiet Quack." Mommy: Oh, it's really great that you made it up, but maybe we should say Loud Larry instead." (Polite Pete and Rude Randy were characters a child behavioural specialist had introduced to deal with some behavioural issues)

4y11m: "When I grow up, I'm going to have two jobs - superhero and author. Wait. And illustrator, too!"

5y: "Look DS4, the colour tablet is dissolving!"

5y: "I will just pretend I'm a lighter version of myself and I'll float to the surface."

5y2m: "Daddy, your hair looks like a forest" (snow sticking to his hair looked like snow-ladden trees)

5y3m (building Sam (his first robot)): "I just need to make another small adjustment. There, now that's good engineering."

5y4m: �Mommy, did you know that a long, long time ago, meteorites hit the earth, giving us a rich supply of water?"

5y4m: "It looks like a little mouse scurried across the page."

5y5m: "Behold the XT Flyer!"

5y5m: "Mommy, I am looking at the constellations. This is the Big Dipper, cause look..." (Pointing at a picture with a starry sky)

5y5m: "Mommy, how were plants made? No, I don't mean from the seeds and stuff, I mean how was the first plant made?"

5y5m: "Mommy, how does evolution work?"

5y5m: "Mommy, you know if you lost all of your blood and bones, you would just be a big sack of goo and skin?"

5y5m: "After you die, your body goes into the ground and you decompose."

5y5m: �Pretend you don't know where my secret laboratory is.�

5y5m after DS4 said his favourite animal is a turtle but that it�s so slow: "But if a predator comes, it can hide in its shell and it will think it's a rock. It has great protection."

5y6m: "The butterfly is mimicking! Don't let nature trick you!"

5y6m: �Sunday is always �son� day, which is why me and DS4 always party.�

5y6m (as I was helping him with sit-dives): �You made me dive seamlessly!�

5y7m: �Mommy, what causes the tide? Oh yeah, I forgot! It�s the moon�s gravity that pulls the water toward it!�

5y7m: �Do you know why the clouds move? It�s because the wind pushes them. And they don�t move any faster because they are too heavy for the wind to push them any faster.�

5y7m: After daddy said it was like there was a war going on in his tummy: �Actually, there IS a war going on in there between the germs and your white blood cells!�