You're going to want to start by making the materials needed:
Materials*** Spoiler - click to reveal ***
Plasma
Fire + Energy
Sun
Plasma + Void
Semiconductor
Electricity + Knowledge
Radio Wave
Energy + Semiconductor
Car
Cart + Oil
Dust
Air + Earth
Shopping
Human + Money
Clothing
Fabric + Human
Tea
Energy + Grass
Book
Knowledge + Paper
Airplane
Air + Car
Armor
Clothing + Metal
Lightbulb
Glass + Void
Clock
Mechanism + Time
Rocket
Airplane + Void
Missile
Rocket + Weapon
DNA
Knowledge + Life
Vacuum Tube
Lightbulb + Semiconductor
Radiowave
Electricity + Void
TV
Lightbulb + Radiowave (You may already have this unlocked from the beginning)
Then, start going through the decades:
1900*** Spoiler - click to reveal ***Air Conditioner
Air + Freezer
Teabag
Fabric + Tea
Assembly Line
Order + Work
Theory of Relativity
Knowledge + Time
Cellophane
Fabric + Oil
Vacuum Cleaner
Dust + Void
Crayons
Limestone + Oil
Washing Machine
Clothing + Water
Helicopter
Air + Mechanism
Zeppelin
Air + Fabric
1910*** Spoiler - click to reveal ***Bra
Clothing + Woman
Stainless Steel
Knowledge + Metal
Crossword
Games + Knowledge
Tank
Armor + Car
Gas Mask
Air + Armor
Toaster
Electricity + Bread
Lie Detector
Knowledge + Human/Sin
Vitamin
Food + Life
Neon Lamp
Electricity + Neon
Zipper
Clothing + Mechanism
1920*** Spoiler - click to reveal ***Antibiotics
Medicine + Bacteria
Radar
Airplane + Radiowave
Bandaid
Fabric + Glue
Robot
Work + Mechanism
Big Bang Theory
Knowledge + Void
Sunglasses
Glass + Sun
Bubble Gum
Food + Fun
Traffic Lights
Car + Order
Frozen Food
Food + Freezer
Yo-Yo
Fun + Games
1930*** Spoiler - click to reveal ***Duct Tape
Cellophane + Glue
Photocopier
Paper + Photo
FM Radio
Music + Radiowave
Polaroid
Mechanism/Time + Photo
Jet Engine
Fire + Mechanism
Radio Telescope
Radar + Void OR Knowledge + Radiowave
Monopoly
Games + Money
Shopping Cart
Shopping + Cart
Parking Meter
Car + Money
Software
Knowledge + Magic
1940*** Spoiler - click to reveal ***AK-47
Firearm + Magic
First Computer
Software + Transistor/Vacuum Tube
Aqualung
Gas Mask + Water
Microwave Oven
Food + Radiowave
Bar Code
Money + Shopping
Nuclear Bomb
Plutonium + Plutonium/Weapon
Bazooka
Missile + Weapon
Nuclear Power Reactor
Energy + Plutonium
Bikini
Clothing + Sun
Transistor
Electricity + Semiconductor
1950*** Spoiler - click to reveal ***Black Box
Airplane + Earth
Liquid Paper
Paper + Water
Credit Card
Money + Debt
Microchip
Transistor + Transistor
Digital Clock
Clock + Transistor/Semi-Conductor
Satellite
Robot/Rocket + Void
Fast Food
Food + Time
Solar Cell
Electricity + Sun
Laser
Energy + Semiconductor
Super Glue
Glue + Time
1960*** Spoiler - click to reveal ***3d Holography
Life + Photo
Digital Photography
First Computer + Photo
ATM
Credit Card/Mechanism + Money
Hypertext
Book + Software
Astronaut
Human + Void/Rocket
Kevlar
Armor + Fabric
Audio Casette
Cellophane + Music
Moon Lander
Car + Void
Video Game
First Computer + Games
Computer Mouse
First Computer + Video Game
1970*** Spoiler - click to reveal ***Cellphone
Phone + Radiowave
Karaoke
Games/Video Game + Music
Copyright
Games + Puzzle
Microprocessor
Microchip + Software
Digital Camera
Digital Photography + Time/Life
Personal Computer
First Computer + Micro-processor
Floppy Disk
Audio Cassette + Software
Cellophane + Software
Space Station
Astronaut/Satellite + Satellite
Hybrid Vehicle
Car + Electricity
Stereo
Music + Music
1980*** Spoiler - click to reveal ***Artificial Heart
Mechanism + Medicine
Internet
First Computer + First Computer
CD
Floppy Disk + Laser
MS-DOS
Personal Computer + Software
DNA Fingerprinting
DNA + Knowledge
Modular Space Station
Space Station/Satellite + Space Station
Fax Machine
Paper + Phone
Virtual Reality
Life + Video Game
Flash Memory
Book + Microchip
Windows
MS-DOS + Software
1990*** Spoiler - click to reveal ***DVD
CD + CD
Sea Launch
Rocket + Water
GPS
Radiowave/Knoweldge + Satellite
Smartphone
Cellphone + Personal Computer
MP3 Player
Microchip + Music
USB
Order + Personal Computer
Memory Card
Flash Memory + Book/Software
WWW
Hypertext + Internet
Plasma TV
Plasma + TV
Webcam
Digital Camera + Internet
Put any comments/questions you may have below; and, good luck!
Thanks to
kabobles for some edits!