Dora and Diego Birthday Party Theme

Decorations
Color scheme: pink, orange and green (jungle) colors.

Decorate the party with streamers and balloons.  A fun way to hang streamers is to cut the crepe paper into strips varying from 8" to 12".  Tape them next to each so they hang down on mantles, doorways, stairways, etc.  Make vines for Diego by twisting large pieces of green tissue paper into ropes.  Attach to walls, doors and even furniture.  Use different colors of green to give it depth.  Cut out leaves and attach to the vines. 

Fun Ideas
A fun idea for a Dora / Diego party is to have an adult dress up as Swiper.  Let them hide until it is time to tell the children what he has swiped and hidden (see Dora / Diego treasure hunt below) so the children will be surprised.  Swiper should be dressed in grey with blue gloves and a blue mask.  Paint on a black nose and whiskers with face paint.

Games
Scavenger / Treasure Hunt
Make a fun scavenger / treasure hunt for the birthday party guests.  Let the guests use clues to search for missing or stolen (Swiper!) objects from the birthday party. 
Before the party:    Decide on what objects will be missing that the children have to find.   Good ideas for missing objects are:  cake candles, the birthday cake itself, flatware, balloons, blowers / horns, the presents, small stuffed animals.   Hide several of these items and let the children pick them up and carry them on the journey.  When you have decided where the items will be hidden make a list of their locations.   Also make a list of where you will hide the objects - add several places that items won't be hidden but that will be part of the treasure hunt.  Number these hiding places on your list. 

Place the clues around the party area so that one clue will lead to the next and so on.  Hide small party favors along the way that the children can take home with them.  Some suggestions are party hats, rings, blowers / horns, magnifying glasses, etc.    To make the hunt last longer you can make the children have to perform a task before they can get the next clue.  Fun ideas are:  build a tower of blocks, sing a nursery rhyme, say the alphabet backwards, etc.

For fun you can decorate the house and yard into different areas that will give them a clue where to look.  For example:  Hang wrapped candies from a tree and call it the "sugar tree".  Place large lollipops in the yard (poke the stick into the ground) and call it the "lollipop forest".  Decorate a room in blue for the "shimmering lake" or brown for a "cave".

Decide what you want Swiper to swipe from the party.  The cake or the presents are always fun.  Make sure the children see the cake on the table or the presents lined up before they are swiped.  Distract them with a game in another room and move the cake or presents (or both!) to their hiding spot.  Then announce that it's time to open presents ... or have cake and ice cream.  Pretend to be concerned that the presents are missing.  Look around the room for them and ask the children if they have seen them.  If you have someone to dress up as Swiper have them appear.   If you do not have anyone to dress up as Swiper then tell the children that you know who did this ... it must be Swiper!

Drawstring bags or small backpacks make great party favors for a Dora / Diego party and they can be used now while the children are trying to find the missing items. 

You can also hide a small stuffed animal along with the missing birthday items and let the children find it through clues about what color it is, what it eats, habitat, etc. 

Here are a list of more fun games to play at birthday parties

Activities
Decorate drawstring bags or backpacks
Paint wooden picture frames and decorate with glitter, paint and/or foam cut-outs
Decorate cupcakes or brownies
More fun birthday party activities

Food
Chips, Salsa, Queso and Guacamole
Cheese and Chicken Quesadillas
Tacos - Have a serve yourself taco bar where party guests can add their own toppings.
Cream cheese pinwheels - Spread cream cheese on a tortilla (add chopped green chili if desired) then roll up.  Start at the end and cut the tortilla "tube" every 1" .  The circular pieces look like pinwheels. 
Sopapillas and honey (Fried Mexican pastry)

Party Favor Ideas
Compass
Canteen
Small pair of binoculars
Magnifying glass
Maracas
Mexican Jumping Beans
Small stuffed animal
Plastic animals
Dora and Diego themed items such as stickers, chapstick, etc.
Small notepad and pencil   

Goody / Loot Bags
Contain your Dora / Diego party favors in:
Small backpacks or drawstring bags
Sombrero
Fiesta printed bandana (wrap around the party favors and tie with string)