Anna wants us to wash socks where are they?

These items are needed to get Sergio to give you the Radio Room Key. He asks Scooby and Shaggy to make him soup, bring him clean socks and then bring him a box of tissues. Here's where you will find both items you requested:

First thing, notice that there are several doors beside the main door going into the back side of the Chalet. Each door has a sign hanging over it with a symbol for what is in the room. For example, the kitchen has a fork,knife and spoon, the laundry has folded clothes and the storeroom has a box.

To get the items you want to go back towards the Chalet and go into the corresponding door for what you are seeking (of course you can also go in the main back door and make your way through the Chalet to the hallway with doors to all the rooms you need.)

Socks
Go into the laundry room (sign with folded clothes). You will see baskets of dirty clothes. Pick one up and toss it into the washer. After a few seconds it will spit out a basket of clean folded clothes. Pick the basket of clean clothes up and take it back to Sergio in the cellar (just toss the basket at the cellar)

Tissues
Go into the store room (sign has a box) Here you will need the magnifying glass. As Scooby, go through the Scooby door (near the door back into the Chalet and near the shelving unit.) This will take you up on the top of the shelves. Get out the magnifying glass and point it at the boxes on the shelf. One will change into a tissue box. Pick it up and take it back to Sergio, throw it into the cellar.

By the way -
He also asks for Pumpkin and Broccoli soup.

Soup
Go into the kitchen and pick up a Pumpkin from the table on the right, jump onto the weird "conveyor belt with pot machine/stove " and toss the pumpkin into the pot. Do the same with the stock of broccoli. A hot bowl of soup will pop out of the "stove". Pick it up and carry it back to Sergio and toss it into the cellar.

After Sergio gets all three items he will finally "throw" the key to the Radio room out for you to pick up.

Hope this helps.

Go to the wash room you will see some baskets of poo toss it into the washer then take it to surgigo (make sure it is not too smelly)